v3.70.0

changelog.md

@@ -1,5 +1,50 @@
 # Changelog
 
+## 2026-04-08 - 3.70.0 - feat(dees-table)
+add opt-in flash highlighting for updated table cells
+
+- introduces highlight-updates and highlight-duration properties for diff-based cell update highlighting
+- adds a warning banner when flash highlighting is enabled without rowKey
+- keeps selection stable across data refreshes and avoids flashing user-edited cells
+- includes a live demo showcasing flashing updates and reduced-motion support
+
+## 2026-04-08 - 3.69.1 - fix(ui)
+refine heading emphasis and animate app dashboard subview expansion
+
+- Adjust heading color hierarchy so h1-h2 use primary text while h3-h6 use secondary text, and reduce h1 font weight for better visual balance
+- Replace app dashboard subview conditional rendering with animated expand/collapse behavior using grid transitions and inert state handling
+
+## 2026-04-08 - 3.69.0 - feat(dees-heading)
+add numeric aliases for horizontal rule heading levels and refine heading spacing styles
+
+- Support level="7" as an alias for "hr" and level="8" as an alias for "hr-small".
+- Update heading and hr variant styles to use design tokens for spacing and colors, with per-level margin tuning.
+- Extend the demo to show both named and numeric hr heading level variants.
+
+## 2026-04-08 - 3.68.0 - feat(dees-simple-appdash)
+add nested sidebar subviews and preserve submit labels from slotted text
+
+- support grouped navigation items with expandable subviews and parent-to-first-subview fallback in the app dashboard
+- allow dees-form-submit to derive its button text from light DOM content when no explicit text property is set
+
+## 2026-04-07 - 3.67.1 - fix(repo)
+no changes to commit
+
+
+## 2026-04-07 - 3.67.0 - feat(dees-table)
+improve inline cell editors with integrated input styling and auto-open dropdowns
+
+- add a visually integrated mode to dees-input-text and dees-input-dropdown for table cell editing
+- auto-open dropdown editors when a table cell enters edit mode
+- refine table editing cell outline and dropdown value matching for inline editors
+
+## 2026-04-07 - 3.66.0 - feat(dees-table)
+add virtualized row rendering for large tables and optimize table rendering performance
+
+- add a virtualized mode with configurable overscan to render only visible rows while preserving scroll height
+- improve table render performance with memoized column and view-data computation plus deferred floating header rendering
+- update the dees-table demo to showcase virtualized scrolling in the fixed-height example
+
 ## 2026-04-07 - 3.65.0 - feat(dees-table)
 add schema-based in-cell editing with keyboard navigation and cell edit events
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@design.estate/dees-catalog",
-  "version": "3.65.0",
+  "version": "3.70.0",
   "private": false,
   "description": "A comprehensive library that provides dynamic web components for building sophisticated and modern web applications using JavaScript and TypeScript.",
   "main": "dist_ts_web/index.js",

ts_web/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@design.estate/dees-catalog',
-  version: '3.65.0',
+  version: '3.70.0',
   description: 'A comprehensive library that provides dynamic web components for building sophisticated and modern web applications using JavaScript and TypeScript.'
 }

ts_web/elements/00group-dataview/dees-table/dees-table.demo.ts

@@ -1,6 +1,7 @@
 import { type ITableAction } from './dees-table.js';
 import * as plugins from '../../00plugins.js';
 import { html, css, cssManager } from '@design.estate/dees-element';
+import '@design.estate/dees-wcctools/demotools';
 
 interface ITableDemoData {
   date: string;
@@ -700,7 +701,8 @@ export const demoFunc = () => html`
         <dees-table
           id="scrollSmallHeight"
           .fixedHeight=${true}
-          heading1="People Directory (Scrollable)"
+          .virtualized=${true}
+          heading1="People Directory (Scrollable, Virtualized)"
           heading2="Forced scrolling with many items"
           .columns=${[
             { key: 'id', header: 'ID', sortable: true },
@@ -741,6 +743,71 @@ export const demoFunc = () => html`
           ] as ITableAction[]}
         ></dees-table>
       </div>
+
+      <dees-demowrapper .runAfterRender=${async (elementArg: HTMLElement) => {
+        const tableEl = elementArg.querySelector('#demoLiveFlash') as any;
+        if (!tableEl) return;
+        // Guard against double-start if runAfterRender fires more than once
+        // (e.g. across hot-reload cycles).
+        if (tableEl.__liveFlashTimerId) {
+          window.clearInterval(tableEl.__liveFlashTimerId);
+        }
+        const tick = () => {
+          if (!Array.isArray(tableEl.data) || tableEl.data.length === 0) return;
+          const next = tableEl.data.map((r: any) => ({ ...r }));
+          const count = 1 + Math.floor(Math.random() * 3);
+          for (let i = 0; i < count; i++) {
+            const idx = Math.floor(Math.random() * next.length);
+            const delta = +((Math.random() * 2 - 1) * 3).toFixed(2);
+            const newPrice = Math.max(1, +(next[idx].price + delta).toFixed(2));
+            next[idx] = {
+              ...next[idx],
+              price: newPrice,
+              change: delta,
+              updatedAt: new Date().toLocaleTimeString(),
+            };
+          }
+          tableEl.data = next;
+        };
+        tableEl.__liveFlashTimerId = window.setInterval(tick, 1500);
+      }}>
+        <div class="demo-section">
+          <h2 class="demo-title">Live Updates with Flash Highlighting</h2>
+          <p class="demo-description">
+            Opt-in cell-flash via <code>highlight-updates="flash"</code>. The ticker below mutates
+            random rows every 1.5s and reassigns <code>.data</code>. Updated cells briefly flash
+            amber and fade out. Requires <code>rowKey</code> (here <code>"symbol"</code>). Honors
+            <code>prefers-reduced-motion</code>. Row selection persists across updates — click a
+            row, then watch it stay selected as the data churns.
+          </p>
+          <dees-table
+            id="demoLiveFlash"
+            .rowKey=${'symbol'}
+            highlight-updates="flash"
+            .selectionMode=${'multi'}
+            heading1="Live Market Feed"
+            heading2="Flashing cells indicate updated values"
+            .columns=${[
+              { key: 'symbol', header: 'Symbol', sortable: true },
+              { key: 'price', header: 'Price', sortable: true },
+              { key: 'change', header: 'Δ', sortable: true },
+              { key: 'updatedAt', header: 'Updated' },
+            ]}
+            .data=${[
+              { symbol: 'AAPL', price: 182.52, change: 0, updatedAt: '—' },
+              { symbol: 'MSFT', price: 414.18, change: 0, updatedAt: '—' },
+              { symbol: 'GOOG', price: 168.74, change: 0, updatedAt: '—' },
+              { symbol: 'AMZN', price: 186.13, change: 0, updatedAt: '—' },
+              { symbol: 'TSLA', price: 248.50, change: 0, updatedAt: '—' },
+              { symbol: 'NVDA', price: 877.35, change: 0, updatedAt: '—' },
+              { symbol: 'META', price: 492.96, change: 0, updatedAt: '—' },
+              { symbol: 'NFLX', price: 605.88, change: 0, updatedAt: '—' },
+              { symbol: 'AMD',  price: 165.24, change: 0, updatedAt: '—' },
+              { symbol: 'INTC', price:  42.15, change: 0, updatedAt: '—' },
+            ]}
+          ></dees-table>
+        </div>
+      </dees-demowrapper>
     </div>
   </div>
 `;

ts_web/elements/00group-dataview/dees-table/styles.ts

@@ -373,6 +373,72 @@ export const tableStyles: CSSResult[] = [
         line-height: 24px;
       }
 
+      /* ---- Cell flash highlighting (opt-in via highlight-updates="flash") ----
+         Bloomberg/TradingView-style: the text itself briefly takes an accent
+         color then fades back to the default. No background tint, no layout
+         shift, no weight change. Readable, modern, subtle.
+         Consumers can override per instance:
+           dees-table#myTable { --dees-table-flash-color: hsl(142 76% 40%); }
+      */
+      :host {
+        --dees-table-flash-color: ${cssManager.bdTheme(
+          'hsl(32 95% 44%)',
+          'hsl(45 93% 62%)'
+        )};
+        --dees-table-flash-easing: cubic-bezier(0.22, 0.61, 0.36, 1);
+      }
+
+      .innerCellContainer.flashing {
+        animation: dees-table-cell-flash
+                   var(--dees-table-flash-duration, 900ms)
+                   var(--dees-table-flash-easing);
+      }
+
+      /* Hold the accent color briefly, then fade back to the theme's default
+         text color. Inherits to child text and to SVG icons that use
+         currentColor. Cells with explicit color overrides in renderers are
+         intentionally unaffected. */
+      @keyframes dees-table-cell-flash {
+        0%,
+        35% { color: var(--dees-table-flash-color); }
+        100% { color: var(--dees-color-text-primary); }
+      }
+
+      @media (prefers-reduced-motion: reduce) {
+        .innerCellContainer.flashing {
+          animation: none;
+          color: var(--dees-table-flash-color);
+        }
+      }
+
+      /* Dev-time warning banner shown when highlight-updates="flash" but
+         rowKey is missing. Consumers should never ship this to production. */
+      .flashConfigWarning {
+        display: flex;
+        align-items: center;
+        gap: 8px;
+        margin: 8px 16px 0;
+        padding: 8px 12px;
+        border-left: 3px solid ${cssManager.bdTheme('hsl(38 92% 50%)', 'hsl(48 96% 63%)')};
+        background: ${cssManager.bdTheme('hsl(48 96% 89% / 0.6)', 'hsl(48 96% 30% / 0.15)')};
+        color: ${cssManager.bdTheme('hsl(32 81% 29%)', 'hsl(48 96% 80%)')};
+        font-size: 12px;
+        line-height: 1.4;
+        border-radius: 4px;
+      }
+      .flashConfigWarning dees-icon {
+        width: 14px;
+        height: 14px;
+        flex: 0 0 auto;
+      }
+      .flashConfigWarning code {
+        padding: 1px 4px;
+        border-radius: 3px;
+        background: ${cssManager.bdTheme('hsl(0 0% 100% / 0.6)', 'hsl(0 0% 0% / 0.3)')};
+        font-family: ${cssGeistFontFamily};
+        font-size: 11px;
+      }
+
       /* Editable cell affordances */
       td.editable {
         cursor: text;
@@ -386,6 +452,11 @@ export const tableStyles: CSSResult[] = [
       }
       td.editingCell {
         padding: 0;
+        outline: 2px solid ${cssManager.bdTheme(
+          'hsl(222.2 47.4% 51.2% / 0.6)',
+          'hsl(217.2 91.2% 59.8% / 0.6)'
+        )};
+        outline-offset: -2px;
       }
       td.editingCell .innerCellContainer {
         padding: 0;

ts_web/elements/00group-dataview/dees-table/types.ts

@@ -48,6 +48,7 @@ export interface Column<T = any> {
   header?: string | TemplateResult;
   value?: (row: T) => any;
   renderer?: (value: any, row: T, ctx: { rowIndex: number; colIndex: number; column: Column<T> }) => TemplateResult | string;
+  /** Whether this column can be sorted by clicking its header. Defaults to `true`; set to `false` to disable. */
   sortable?: boolean;
   /** whether this column participates in per-column quick filtering (default: true) */
   filterable?: boolean;

ts_web/elements/00group-form/dees-form-submit/dees-form-submit.ts

@@ -75,12 +75,23 @@ export class DeesFormSubmit extends DeesElement {
         .text=${this.text}
         ?disabled=${this.disabled}
         @clicked=${this.submit}
-      >
-        <slot></slot>
-      </dees-button>
+      ></dees-button>
     `;
   }
 
+  public async firstUpdated() {
+    // Capture light DOM text content as the button label. dees-button wipes
+    // its own light DOM during extractLightDom(), so we cannot simply forward
+    // a <slot> into it — we have to hoist the text onto the .text property
+    // ourselves before handing it to dees-button.
+    if (!this.text) {
+      const slotText = this.textContent?.trim();
+      if (slotText) {
+        this.text = slotText;
+      }
+    }
+  }
+
   public async submit() {
     if (this.disabled) {
       return;

ts_web/elements/00group-input/dees-input-dropdown/dees-input-dropdown.ts

@@ -46,6 +46,12 @@ export class DeesInputDropdown extends DeesInputBase<DeesInputDropdown> {
   })
   accessor enableSearch: boolean = true;
 
+  @property({
+    type: Boolean,
+    reflect: true,
+  })
+  accessor vintegrated: boolean = false;
+
   @state()
   accessor isOpened = false;
 
@@ -126,6 +132,36 @@ export class DeesInputDropdown extends DeesInputBase<DeesInputDropdown> {
       .selectedBox.open::after {
         transform: translateY(-50%) rotate(180deg);
       }
+
+      /* Visually integrated mode: shed chrome to blend into a host component
+         (e.g. a dees-table cell in edit mode). */
+      :host([vintegrated]) dees-label {
+        display: none;
+      }
+      :host([vintegrated]) .maincontainer {
+        height: 40px;
+      }
+      :host([vintegrated]) .selectedBox {
+        height: 40px;
+        line-height: 40px;
+        padding: 0 32px 0 16px;
+        font-size: 13px;
+        border: none;
+        border-radius: 0;
+        background: transparent;
+        box-shadow: none;
+        transition: none;
+      }
+      :host([vintegrated]) .selectedBox:hover:not(.disabled),
+      :host([vintegrated]) .selectedBox:focus-visible {
+        border: none;
+        box-shadow: none;
+        background: transparent;
+      }
+      :host([vintegrated]) .selectedBox::after {
+        right: 12px;
+        opacity: 0.6;
+      }
     `,
   ];
 

ts_web/elements/00group-input/dees-input-text/dees-input-text.ts

@@ -57,6 +57,12 @@ export class DeesInputText extends DeesInputBase {
   @property({})
   accessor validationFunction!: (value: string) => boolean;
 
+  @property({
+    type: Boolean,
+    reflect: true,
+  })
+  accessor vintegrated: boolean = false;
+
   public static styles = [
     themeDefaultStyles,
     ...DeesInputBase.baseStyles,
@@ -194,6 +200,36 @@ export class DeesInputText extends DeesInputBase {
         border-color: ${cssManager.bdTheme('hsl(142.1 76.2% 36.3%)', 'hsl(142.1 70.6% 45.3%)')};
         box-shadow: 0 0 0 2px ${cssManager.bdTheme('hsl(142.1 76.2% 36.3% / 0.05)', 'hsl(142.1 70.6% 45.3% / 0.05)')};
       }
+
+      /* Visually integrated mode: shed chrome to blend into a host component
+         (e.g. a dees-table cell in edit mode). */
+      :host([vintegrated]) dees-label,
+      :host([vintegrated]) .validationContainer {
+        display: none;
+      }
+      :host([vintegrated]) .maincontainer {
+        height: 40px;
+      }
+      :host([vintegrated]) input {
+        height: 40px;
+        line-height: 24px;
+        padding: 0 16px;
+        font-size: 13px;
+        border: none;
+        border-radius: 0;
+        background: transparent;
+        box-shadow: none;
+        transition: none;
+      }
+      :host([vintegrated]) input:hover:not(:disabled):not(:focus),
+      :host([vintegrated]) input:focus {
+        border: none;
+        box-shadow: none;
+        background: transparent;
+      }
+      :host([vintegrated]) .showPassword {
+        display: none;
+      }
     `,
   ];
 

ts_web/elements/00group-layout/dees-heading/dees-heading.demo.ts

@@ -8,7 +8,9 @@ export function demoFunc() {
     <dees-heading level="4">This is a H4 heading</dees-heading>
     <dees-heading level="5">This is a H5 heading</dees-heading>
     <dees-heading level="6">This is a H6 heading</dees-heading>
-    <dees-heading level="hr">This is an hr heading</dees-heading>
-    <dees-heading level="hr-small">This is an hr small heading</dees-heading>
+    <dees-heading level="hr">This is an hr heading (level="hr")</dees-heading>
+    <dees-heading level="7">This is an hr heading (level="7")</dees-heading>
+    <dees-heading level="hr-small">This is an hr-small heading (level="hr-small")</dees-heading>
+    <dees-heading level="8">This is an hr-small heading (level="8")</dees-heading>
   `;
 }

ts_web/elements/00group-layout/dees-heading/dees-heading.ts

@@ -27,68 +27,104 @@ export class DeesHeading extends DeesElement {
 
   // properties
   /**
-   * Heading level: 1-6 for h1-h6, or 'hr' for horizontal rule style
+   * Heading level:
+   *   '1'-'6'  → <h1>..<h6>
+   *   '7'|'hr'       → horizontal-rule style heading
+   *   '8'|'hr-small' → small horizontal-rule style heading
    */
   @property({ type: String, reflect: true })
-  accessor level: '1' | '2' | '3' | '4' | '5' | '6' | 'hr' | 'hr-small' = '1';
+  accessor level: '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | 'hr' | 'hr-small' = '1';
 
   // STATIC STYLES
   public static styles: CSSResult[] = [
     themeDefaultStyles,
     cssManager.defaultStyles,
     css`
-      /* TODO: Migrate hardcoded values to --dees-* CSS variables */
-      /* Heading styles */
-      h1, h2, h3, h4, h5, h6 {
-        margin: 16px 0 8px;
-        font-weight: 600;
-        color: ${cssManager.bdTheme('#000', '#fff')};
+      :host {
+        display: block;
       }
-      h1 { font-size: 32px; font-family: ${cssCalSansFontFamily}; letter-spacing: 0.025em;}
-      h2 { font-size: 28px; }
-      h3 { font-size: 24px; }
-      h4 { font-size: 20px; }
-      h5 { font-size: 16px; }
-      h6 { font-size: 14px; }
+
+      /* Heading styles.
+       * Color hierarchy: h1-h2 stay prominent with text-primary; h3-h6 step
+       * down to text-secondary so they read as subheadings instead of
+       * mini-h1s. Keeps the visual loudness out of smaller headings. */
+      h1, h2, h3, h4, h5, h6 {
+        font-weight: 600;
+      }
+      h1, h2 {
+        color: var(--dees-color-text-primary);
+      }
+      h3, h4, h5, h6 {
+        color: var(--dees-color-text-secondary);
+      }
+
+      /* Per-level typography + spacing.
+       * Margin scales with importance: h1 gets the most breathing room,
+       * h6 the least. Top margin > bottom margin so headings group with
+       * the content that follows them. */
+      h1 {
+        /* h1 uses weight 500, not 600: the Cal Sans display font is
+         * already stylized enough that bold + max contrast + 32px stacks
+         * too much emphasis. 500 keeps the typographic impact without
+         * shouting. */
+        font-weight: 500;
+        font-size: 32px;
+        font-family: ${cssCalSansFontFamily};
+        letter-spacing: 0.025em;
+        margin: var(--dees-spacing-2xl) 0 var(--dees-spacing-lg);
+      }
+      h2 {
+        font-size: 28px;
+        margin: var(--dees-spacing-xl) 0 var(--dees-spacing-md);
+      }
+      h3 {
+        font-size: 24px;
+        margin: var(--dees-spacing-xl) 0 var(--dees-spacing-md);
+      }
+      h4 {
+        font-size: 20px;
+        margin: var(--dees-spacing-lg) 0 var(--dees-spacing-sm);
+      }
+      h5 {
+        font-size: 16px;
+        margin: var(--dees-spacing-md) 0 var(--dees-spacing-sm);
+      }
+      h6 {
+        font-size: 14px;
+        margin: var(--dees-spacing-md) 0 var(--dees-spacing-xs);
+      }
+
       /* Horizontal rule style heading */
       .heading-hr {
         display: flex;
         align-items: center;
         text-align: center;
-        margin: 16px 0;
-        color: ${cssManager.bdTheme('#999', '#555')};
+        margin: var(--dees-spacing-lg) 0;
+        color: var(--dees-color-text-muted);
       }
       /* Fade lines toward and away from text for hr style */
       .heading-hr::before {
         content: '';
         flex: 1;
         height: 1px;
-        /* fade in toward center */
-        background: ${cssManager.bdTheme(
-          'linear-gradient(to right, transparent, #ccc)',
-          'linear-gradient(to right, transparent, #333)'
-        )};
-        margin: 0 8px;
+        background: linear-gradient(to right, transparent, var(--dees-color-border-strong));
+        margin: 0 var(--dees-spacing-sm);
       }
       .heading-hr::after {
         content: '';
         flex: 1;
         height: 1px;
-        /* fade out away from center */
-        background: ${cssManager.bdTheme(
-          'linear-gradient(to right, #ccc, transparent)',
-          'linear-gradient(to right, #333, transparent)'
-        )};
-        margin: 0 8px;
+        background: linear-gradient(to right, var(--dees-color-border-strong), transparent);
+        margin: 0 var(--dees-spacing-sm);
       }
       /* Small hr variant with reduced margins */
       .heading-hr.heading-hr-small {
-        margin: 8px 0;
+        margin: var(--dees-spacing-sm) 0;
         font-size: 12px;
       }
       .heading-hr.heading-hr-small::before,
       .heading-hr.heading-hr-small::after {
-        margin: 0 8px;
+        margin: 0 var(--dees-spacing-sm);
       }
     `,
   ];
@@ -109,8 +145,10 @@ export class DeesHeading extends DeesElement {
         return html`<h5><slot></slot></h5>`;
       case '6':
         return html`<h6><slot></slot></h6>`;
+      case '7':
       case 'hr':
         return html`<div class="heading-hr"><slot></slot></div>`;
+      case '8':
       case 'hr-small':
         return html`<div class="heading-hr heading-hr-small"><slot></slot></div>`;
       default:

ts_web/elements/00group-simple/dees-simple-appdash/dees-simple-appdash.demo.ts

@@ -353,12 +353,35 @@ export const demoFunc = () => html`
           name: 'Analytics',
           iconName: 'lucide:lineChart',
           element: DemoViewAnalytics,
+          subViews: [
+            {
+              name: 'Overview',
+              iconName: 'lucide:activity',
+              element: DemoViewAnalytics,
+            },
+            {
+              name: 'Reports',
+              iconName: 'lucide:fileText',
+              element: DemoViewDashboard,
+            },
+          ],
         },
         {
           name: 'Settings',
           iconName: 'lucide:settings',
-          element: DemoViewSettings,
-        }
+          subViews: [
+            {
+              name: 'Profile',
+              iconName: 'lucide:user',
+              element: DemoViewSettings,
+            },
+            {
+              name: 'Billing',
+              iconName: 'lucide:creditCard',
+              element: DemoViewSettings,
+            },
+          ],
+        },
       ] as IView[]}
       @logout=${() => {
         console.log('Logout event triggered');

ts_web/elements/00group-simple/dees-simple-appdash/dees-simple-appdash.ts

@@ -26,7 +26,8 @@ declare global {
 export interface IView {
   name: string;
   iconName?: string;
-  element: DeesElement['constructor']['prototype'];
+  element?: DeesElement['constructor']['prototype'];
+  subViews?: IView[];
 }
 
 export type TGlobalMessageType = 'info' | 'success' | 'warning' | 'error';
@@ -250,6 +251,78 @@ export class DeesSimpleAppDash extends DeesElement {
         white-space: nowrap;
       }
 
+      .viewTab .chevron {
+        flex: 0 0 auto;
+        font-size: 14px;
+        opacity: 0.5;
+        transform: rotate(-90deg);
+        transition: transform 0.2s ease, opacity 0.15s ease;
+      }
+
+      .viewTab.hasSubs:hover .chevron {
+        opacity: 0.75;
+      }
+
+      .viewTab.hasSubs.groupActive .chevron {
+        transform: rotate(0deg);
+        opacity: 0.9;
+      }
+
+      .subViews {
+        display: grid;
+        grid-template-rows: 0fr;
+        margin-left: 12px;
+        position: relative;
+        transition:
+          grid-template-rows 0.25s cubic-bezier(0.4, 0, 0.2, 1),
+          margin-top 0.25s cubic-bezier(0.4, 0, 0.2, 1),
+          margin-bottom 0.25s cubic-bezier(0.4, 0, 0.2, 1);
+      }
+
+      .subViews.expanded {
+        grid-template-rows: 1fr;
+        margin-top: 2px;
+        margin-bottom: 4px;
+      }
+
+      .subViews::before {
+        content: '';
+        position: absolute;
+        left: 0;
+        top: 4px;
+        bottom: 4px;
+        width: 1px;
+        background: var(--dees-color-border-default);
+        opacity: 0;
+        transition: opacity 0.2s ease;
+      }
+
+      .subViews.expanded::before {
+        opacity: 1;
+      }
+
+      .subViews-inner {
+        min-height: 0;
+        overflow: hidden;
+        display: flex;
+        flex-direction: column;
+        gap: 2px;
+        padding-left: 12px;
+      }
+
+      .viewTab.sub {
+        padding: 8px 12px;
+        font-size: 12px;
+      }
+
+      .viewTab.sub dees-icon {
+        font-size: 14px;
+      }
+
+      .viewTab.sub.selected::before {
+        left: -12px;
+      }
+
       .appActions {
         padding: 12px 8px;
         border-top: 1px solid var(--dees-color-border-default);
@@ -563,10 +636,12 @@ export class DeesSimpleAppDash extends DeesElement {
           <div class="viewTabs-container">
             <div class="section-label">Navigation</div>
             <div class="viewTabs">
-              ${this.viewTabs.map(
-                (view) => html`
+              ${this.viewTabs.map((view) => {
+                const hasSubs = !!view.subViews?.length;
+                const groupActive = hasSubs && this.isGroupActive(view);
+                return html`
                   <div
-                    class="viewTab ${this.selectedView === view ? 'selected' : ''}"
+                    class="viewTab ${this.selectedView === view ? 'selected' : ''} ${hasSubs ? 'hasSubs' : ''} ${groupActive ? 'groupActive' : ''}"
                     @click=${() => this.loadView(view)}
                   >
                     ${view.iconName ? html`
@@ -575,9 +650,39 @@ export class DeesSimpleAppDash extends DeesElement {
                       <dees-icon .icon="${'lucide:file'}"></dees-icon>
                     `}
                     <span>${view.name}</span>
+                    ${hasSubs ? html`
+                      <dees-icon class="chevron" .icon="${'lucide:chevronDown'}"></dees-icon>
+                    ` : ''}
                   </div>
-                `
-              )}
+                  ${hasSubs ? html`
+                    <div
+                      class="subViews ${groupActive ? 'expanded' : ''}"
+                      ?inert=${!groupActive}
+                    >
+                      <div class="subViews-inner">
+                        ${view.subViews!.map(
+                          (sub) => html`
+                            <div
+                              class="viewTab sub ${this.selectedView === sub ? 'selected' : ''}"
+                              @click=${(e: Event) => {
+                                e.stopPropagation();
+                                this.loadView(sub);
+                              }}
+                            >
+                              ${sub.iconName ? html`
+                                <dees-icon .icon="${sub.iconName.includes(':') ? sub.iconName : `lucide:${sub.iconName}`}"></dees-icon>
+                              ` : html`
+                                <dees-icon .icon="${'lucide:dot'}"></dees-icon>
+                              `}
+                              <span>${sub.name}</span>
+                            </div>
+                          `
+                        )}
+                      </div>
+                    </div>
+                  ` : ''}
+                `;
+              })}
             </div>
           </div>
           <div class="appActions">
@@ -771,8 +876,23 @@ export class DeesSimpleAppDash extends DeesElement {
   }
 
 
+  private isGroupActive(view: IView): boolean {
+    if (this.selectedView === view) return true;
+    return view.subViews?.some((sv) => sv === this.selectedView) ?? false;
+  }
+
   private currentView!: DeesElement;
   public async loadView(viewArg: IView) {
+    // Group-only parent: resolve to first sub view with an element
+    if (!viewArg.element && viewArg.subViews?.length) {
+      const firstNavigable = viewArg.subViews.find((sv) => sv.element);
+      if (firstNavigable) {
+        return this.loadView(firstNavigable);
+      }
+      return; // nothing navigable — ignore click
+    }
+    if (!viewArg.element) return; // safety: no element and no subs → no-op
+
     const appcontent = this.shadowRoot!.querySelector('.appcontent')!;
     const view = new viewArg.element();
     if (this.currentView) {
@@ -781,7 +901,7 @@ export class DeesSimpleAppDash extends DeesElement {
     appcontent.appendChild(view);
     this.currentView = view;
     this.selectedView = viewArg;
-    
+
     // Emit view-select event
     this.dispatchEvent(new CustomEvent('view-select', {
       detail: { view: viewArg },